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Which guidelines of NABL is followed in laboratory?

The National Accreditation Board for Testing and Calibration Laboratories (NABL) administers laboratory accreditation activities. The NABL Guidelines for Quality ensures that the laboratory complies with ISO 15189 (Medical Laboratories – Requirements for Quality and Competence). The guidelines mandate the laboratories to follow the national, regional and local laws and regulations as applicable. 


Scope of laboratories to acquire NABL Certificate for Quality testing in Chennai

  • Clinical Biochemistry

  • Clinical Pathology

  • Haematology and Immunohaematology

  • Microbiology and Serology 

  • Histopathology 

  • Cytopathology

  • Genetics 

  • Nuclear Medicine (in-vitro tests only)



Guidelines to be followed


Following are a few of the NABL Guidelines for Quality followed by various laboratories:

  • Any laboratory operating at more than one location within a district must have the same legal identity.

  • The lab should have documented policies and procedures for selecting and referring to other labs for a second opinion.

  • A reference material must be used while checking for reagents before use.

  • The certified labs must continuously strive for quality improvement. This evaluation includes and is not limited to sample collection and identification, result analysis and reporting, equipment downtime and measurement uncertainty.

  • The laboratory must decide the retention time of records per national, regional and local regulations. 

  • To ensure the effectiveness of operations, the laboratory must have sufficient space concerning sample collection, workbench, patient reception etc.

  • The laboratory must have an uninterrupted power supply to ensure smooth functioning of gadgets, equipment and other electronic items.

  • Reagents, stains, kits, etc., should be stored as recommended and used before their expiry date.

  • The instruments should be calibrated from NPL, India, or NABL-accredited calibration. Laboratory. Those instruments should be recalibrated after specific intervals of time.


At Tamil Nadu Test House, one of the leading NABL Testing labs in Chennai, we sew up all the NABL regulations required to serve you with the most accurate results. Reach out to us with your testing requirements.
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